Today Agra has become a major tourist attraction in India. The city receives millions of visitors every year, especially to visit the mausoleum of the Taj Mahal, although it has many other interesting things. Agra has a very important historical patrimony which is suffering certain deterioration due to the intense current contamination. Cars are not allowed in the area near the Taj complex, and electric buses are used. The Taj Mahal is undoubtedly one of the most famous mausoleums in the world. It is declared a world heritage site. The Red Fort was built as a palace by Akbar, and later his son made it a military compound. It is declared a world heritage site. Fatehpur Sikri is also declared a world heritage site.